ZiyaZa commented on code in PR #52922:
URL: https://github.com/apache/spark/pull/52922#discussion_r2500584208
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaConverter.scala:
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@@ -836,6 +838,10 @@ class SparkToParquetSchemaConverter(
case udt: UserDefinedType[_] =>
convertField(field.copy(dataType = udt.sqlType), inShredded)
+ case NullType => // Selected primitive type here doesn't have
significance.
Review Comment:
Parquet spec does not specify which Physical type should be used with the
UNKNOWN type, so it can be put on any physical type.
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